Number of Heptominoes

Theorem

There exist $108$ distinct free heptominoes, one of which has a hole:

Proof

This theorem requires a proof. In particular: Work to be done yet to establish method of creation You can help $\mathsf{Pr} \infty \mathsf{fWiki}$ by crafting such a proof. To discuss this page in more detail, feel free to use the talk page. When this work has been completed, you may remove this instance of {{ProofWanted}} from the code. If you would welcome a second opinion as to whether your work is correct, add a call to {{Proofread}} the page.

Sources

• 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $35$
• 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $108$
• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $35$
• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $108$

• Weisstein, Eric W. "Heptomino." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Heptomino.html